Currently, the
manufacturers of HD ip camera has been greatly improved resistance than
before, and more compact design; also appeared specifically for indoor
applications, 360 ° 400mp panoramic surveillance cameras, monitoring a
wider range. Let us know about today's high-definition video camera in
the R & D and production should pay attention to something.
The practical application of thoughtful
Many of HD ip camera have adopted a more structural engineering design. Case selection, good
cooling use more aluminum, aluminum alloy, steel, zinc and other metal,
some products are also designed with ventilation holes. Function
interfaces are generally set parameters are used to restore the factory
reset button camera, easy to use front-end debugging BNC video output
terminal, a variety of power supply models, exceptional circumstances,
the front-end SD card memory slot, etc.; In order to facilitate the
application of different transmission environments Some manufacturers
also have a wireless transmission module is optional camera. The design
allows the camera in the actual projects installed in more demand, and
help maintain long-term applications. However, some manufacturers for
the installation of the camera easy and stability, the interface is
highly integrated, as far as possible with a minimum of cables to
achieve maximum functionality, such as parity, U.S. praise.
High image quality
HD network camera uses both the H.264 compression algorithm, and
usually also have two or three codecs, such as the Axis with H.264 and
M-JPEG, Liling as H.264 ip camera,
MPEG4 and M- JPEG, Sony H.264, MPEG-4, JPEG. Compression algorithms in
their next, more than 800TVL can present a clear picture, which
EverFocus clarity to 1100TVL, U.S. praise up 1200TVL, generally
speaking, than in the past has improved so much; in color reproduction
performance test in addition to individual products in a very subdued
color scale, the other can accurately restored.
The test, 1080P
resolution, format, bandwidth is limited to 4mbps, 720P resolution image
output format of the bandwidth is limited to 2mbps, limitations in the
different parameters, the product stream has good control performance,
even in full frame transmission, will also be able to control the rate
limit. Delay in the network, 720P resolution format are controlled by
the network delay of about 200ms, 1080P resolution, image format network
latency ranging from 290-400ms, the majority of control in more than
300 milliseconds, all delays are In less than 500ms are controlled
appropriately. Good control performance of the network, making
Cencechanpin can test in a dynamic environment will be a smooth moving
picture show.
HD camera network control performance by the camera's
image processing performance impact, and when to maintain a high
quality, the camera's resolution and color better, but the network
latency and bit rate will be too large; when in order to maintain
transmission real-time, chip processing and compression algorithms are
not in place, the image quality will be reduced. So, manufacturers in
the development and production, the need to deal with high-performance
image processing chips and good results using the compression algorithm,
so as to maintain a balance between quality and network performance.
Shot matching is critical
Before the test, we test the lens on the camera image to the impact,
especially to the Tamron, Tokina and other lens manufacturers borrowed
from 8 different models of the lens. Test, we use the original lens
testing, put the lens on the camera borrowed debugging. The results
showed that different focal length lenses have different quality
effects, such as long-term effect of a telephoto lens, but showing
blurred close-range, showing negative close. In general, manufacturers
have products for this test match has the best effect of the camera, so
the lens to help test the effect of the lens is not able to achieve the
effect of wife; course, there are some products good for non-matching
lens, through the lens for after testing to achieve its proper
definition. The lens of the camera image shows the importance of R &
D and production in the factory, the lens must be staffed to enable the
camera to achieve the best imaging results.
HD IP Camera R & D and Manufacturing Need to Pay Attention to Four Points
2016 10/12